OUTSIDERS(35A. Nonmembers … or what 4-, 7- and 10-Down lack?),OCK AND ROLL SINGE (4D. Checker or Domino),ESIGNATION LETTE (7D. It may include two weeks’ notice) andELIGIOUS REFORME (10D. John Calvin, e.g.) constitute the interrelated group of this Thursday crossword.